Catch fish is the second stage in Ninja Fishing. The player must catch as many fish as possible, eg. 45 fish for 50 fish capacity. The player cannot catch more than the hook's capacity. The default hook only holds up to 25 fish, while other upgrades hold up to 35 or up to 50 fish in one go.

As the line descends into the water, the player would try to go as deep as possible, and avoiding the fish. Once the line ascends, the player would try to catch as much fish as possible. Once the line goes out of the water, then that player would start slicing fish.